Counter strike works well on the deck.
Insurgency sandstorm works well on the deck. Needs to be plugged in as it goes through battery fast.
Battlebit Remastered is the latest that works well. Remap some buttons and it’s great.
I use gyro aiming on all of these (turns on with using L2 for aiming.)
Yeah the deck takes practice to get semi decent in fps. I’ve been trying to research if it’s possible to counter recoil movements in game with the deck controls. Nothing yet but maybe someone will figure a work around.